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Effects of Russian wheat aphid (Homoptera: Aphididae) on winter and spring wheat infested during different plant growth stages under greenhouse conditions


Effects of Russian wheat aphid (Homoptera: Aphididae) on winter and spring wheat infested during different plant growth stages under greenhouse conditions



Journal of Economic Entomology 83(6): 2434-2442



ISSN/ISBN: 0022-0493

DOI: 10.1093/jee/83.6.2434

Our experiments sought to assess the effects of Russian wheat aphid, Diuraphis noxia (Mordvilko), on spring and winter wheat (Triticum aestivum L.) at different plant growth stages. Four initial aphid densities of 0, 1, 2, and 4 aphids per plant were used to infest the seedling, tiller, and boot stages of spring wheat. The same aphid treatments were used to infest winter wheat before, after, and both before and after the vernalization process. Plants were harvested and the following vegetative and reproductive parameters were measured: root weight, stem weight, leaf weight, tiller number, head weight, seed number, and seed weight. Spring wheat infested during the tiller and boot stages was most susceptible to reductions in head weight, seed number, and seed weight. Winter wheat was most sensitive to Russian wheat aphid after the vernalization process. Root weight, head weight, seed number, and seed weight were all reduced when aphids were introduced after vernalization had occurred, especially at the highest initial aphid infestation level.

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Accession: 002089187

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